A panel of marijuana industry advocates and regulators starts work Friday on new regulations for pot-infused foods and drinks. The regulators are trying to figure out whether to stamp or mark edible pot so that children and others will know whether the treat contains pot.

Pot start-ups pitch to angel investors

Paid members of the Arcview Group have committed to investing at least $50,000 into the budding cannabis industry. Members are in Denver hearing pitches from pot start-ups, reports CNBC's Josh Lipton.

Colorado, which has legalized the recreational use of marijuana, has a new edibles law that requires products to be shaped, stamped or colored to show they contain pot. But the law says the marking is required only when practicable. So it's unclear how the rule could apply to items such as a marijuana-infused liquid or granola.